See "perldoc version" (version on the CPAN).

perl -le 'print $]'
[download]

5.026003

perl -le 'print $^V'
[download]

v5.26.3

perl -Mversion -le 'print version->parse("5.026003")->normal'
[download]

v5.26.3

perl -Mversion -le 'print version->declare("v5.26.3")->numify'
[download]

5.026003